数据库备份各两天就把300GB的硬盘给塞满了，本来想写批处理来删，不过很久没写了，不会了。Google了一下找到了这个软件，扫毒安全。
下面的介绍复制自官网
DelAge32 is a command line tool that deletes or moves files by age (number of days).
The age is calculated as date difference at local time. By default the “last modified” file stamp is taken to calculate the age (see options /created, /modified and the note about file stamps).
| Syntax: | DelAge32 filespec days [options] |
| Examples: | DelAge32 C:\some\where\*.* 100 /recurse DelAge32 there\*.tmp 1 /created /includeRO Delage32 *.zip 35 |
| filespec | File name search pattern (wildcards) with full or relative path. |
| days | Number of days: minimum age of files to delete or move |
| options | Options begin with a slash, case ignored. All command arguments must be separated by blank space! |
| /preview | The files will not be deleted or moved, but only listed with age. |
| /created | The “created” time stamp is taken to calculate the age. Default is the “last modified” stamp. See note about file stamps (below) |
| /modified | The “last modified” time stamp is taken to calculate the age. This is the default. However, when used in conjunction with the /created option, the most recent one of these two stamps is taken. |
| /accessed | The “last access” time stamp is taken to calculate the age. |
| /includeRO | Include files with Read-Only attribute |
| /includeH | Include files with Hidden attribute |
| /includeS | Include files with System attribute |
| /includeRHS | = /includeRO /includeH /includeS |
| /recurse | Recurse through the entire subdirectory structure (see /rd option to remove empty directories) |
| /subonly | Recurse, but exclude the initial directory |
| /rd | Remove empty subdirectories regardless of age (initial directory will not be removed). Note: /preview will not make any /rd predictions. |
| /move target | Move files instead of deleting; specify target directory. This works across drives. Note: If a target file exists, it will be overwritten without warning! |
| /quiet | No output (makes no sense with the /preview option). By default all deleted or moved files are listed with age (number of days). The output can be redirected to a file (OEM format). |
官网地址：http://home.mnet-online.de/horst.muc/win/delage.htm
我用到的命令是 delage32.exe “E:\Files Backup\*.*” 7 /recurse
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